A Boston-area historical society apologized on Monday for an invitation attempting to play off the lyrics of the Christmas carol “White Christmas.”

The Dorchester Historical Society released an invitation for its annual holiday open house that read “I’m dreaming of a white Dorchester,” Boston CBS reported.

The phrase was meant to reference snowfall and included a picture of the nonprofit's Boston Street location in a snow globe. 

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The promo received backlash from social media users who thought it could be misconstrued to have racial connotations or leave certain people out. 

“The message of a white Christmas implies others are left out,” one Twitter user wrote.

The historical society responded Monday, saying they were "horrified" about how the message was perceived.

“We are very truly sorry about our graphic used for this event. This was an unfortunate oversight on our part and the event photograph has been removed from our social media,” the historical society wrote. “We were simply changing the words to the classic Christmas carol and did not think it through properly.”

“Thank you for alerting us to this matter as we certainly do not want to project that message, even if completely accidentally. Again, thank you,” it added.

The ad on the group's website was changed to read "may your Dorchester days be merry and bright." 

Boston Mayor Marty Walsh (D) told reporters Tuesday that the backlash was a case of “good people” who made a “big mistake.”

“They certainly didn’t mean anything mean or vicious or racist about it. I felt really bad when I saw it last night because they do a lot of good work there, they’re a nonprofit that doesn’t have a lot of money,” Walsh said.

“It’s a lot of volunteers, so they don’t have any professional people around them trying to spin this thing and I honestly think they made an honest mistake," he added.